Name

Synopsis

Description

tftpd is a server that supports the Internet Trivial File Transfer Protocol (TFTP).

Before responding to a request, the server attempts to change its current directory to homedir; the default directory is /tftpboot.

The use of tftp does not require an account or password on the remote system. Due to the lack of authentication information, in.tftpd will allow only publicly readable files to be accessed. Files may be written only if they already exist and are publicly
writable. Note that this extends the concept of “public” to include all users on all hosts that can be reached through the network. This may not be appropriate on all systems, and its implications should be considered before enabling this service.

in.tftpd runs with the user ID and group ID set to [GU]ID_NOBODY under the assumption that no files exist with that owner or group. However, nothing checks this assumption or enforces this restriction.

Options

-d

Debug. When specified it sets the SO_DEBUG socket option.

-s

Secure. When specified, the directory change to homedir must succeed. The daemon also changes its root directory to homedir.

-Trexmtval

Specifies the value of the retransmission timeout in seconds. This also affects the maximum session timeout in that the latter is set to five times the retransmission timeout value.

Notes

The tftpd server only acknowledges the transfer size option that is sent with a read request when the octet transfer mode is specified.

The in.tftpd.1m service is managed by the service management facility, smf(5), under the service identifier:

svc:/network/tftp/udp6:default

Administrative actions on this service, such as enabling, disabling, or requesting restart, can be performed using svcadm(1M). Responsibility for initiating
and restarting this service is delegated to inetd(1M). Use inetadm(1M) to make configuration changes and to view configuration information for this service. The service's status can be queried using the svcs(1) command.

Unlike most smf(5) services, a manifest for the tftp service is not included in the system. To create one and enable this service, the administrator
should:

Edit /etc/inet/inetd.conf and uncomment the tftp entry.

Run /usr/sbin/inetconv.

After you run inetconv, the svc:/network/tftp/udp6:default service is created and enabled.